No, its not Haste > Crit > Mastery. It's whatever you choose. Reforging will have extremely little effect on your effective dps on most fights, since all of our secondary stats are roughly equal. There are numerous threads both here and on the Druid forums about reforging where many of us have spent countless hours reviewing the merits of Haste vs. Mastery, Hit/Exp caps, etc.

suxorz1994 wrote:Oh so it's like up to you on the stats ? For you, would you capped exp and hit and more on mastery instead ?

I use Hit/Exp > Mastery > Crit > Haste because through all my tests it seems the most stable across a variety of fight types. Haste loses the most value out of any stat when you aren't in melee range of the target, compared to Mastery which actually gains value when you aren't in melee range of the target. Hit/Exp are an extremely minimal loss on a patchwerk fight, and on non-patchwerk fights can actually be a gain, plus its easier to focus on the encounter when you don't have to worry about checking to make sure your ability landed.